Re: [PATCH v5 06/17] iommu/arm-smmu-v3: Hold arm_smmu_asid_lock during all of attach_dev

Jason Gunthorpe
2024-02-13T16:19:27Z

On Tue, Feb 13, 2024 at 03:38:57PM +0000, Mostafa Saleh wrote:

> This seems a bit theoretical to me also it requires mis-programming as the master
> will issue DMA in detach

iommufd allows VFIO userspace to do this workload as an attack on the
kernel.

Thanks,
Jason